Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad2383cceeb0033c…

MALICIOUS

PDF

74.2 KB Created: 2021-02-22 04:06:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b7924e86c9d3407081ce81d0c01d4c12 SHA-1: 9b756e7af3f761221cc2423047fc875f2b0c2d14 SHA-256: ad2383cceeb0033cb40136af5e7646a2321559354d5375fd904c66b42931c273
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/strik?utm_term=what+is+the+best+way+to+treat+heart+disease PDF link annotation
    • http://ionatr.fun/835323288567lx0y.pdfIn PDF document text
    • http://itagreen.fun/free_wicca_101_classeslrb0v.pdfIn PDF document text
    • http://rerubin.space/35581658519cwi75.pdfIn PDF document text
    • http://instapriz365.site/background_eraser_tool_app56yax.pdfIn PDF document text
    • http://metazoaapc.fun/what_does_economic_freedom_mean_to_youpjxtk.pdfIn PDF document text
    • https://biruwilajefi.weebly.com/uploads/1/3/4/6/134651793/kigegadowesuz.pdfIn PDF document text
    • https://cdn.sqhk.co/bobavijiwoba/cehangd/40978229918.pdfIn PDF document text
    • http://pelistens.xyz/fefilizafijury41.pdfIn PDF document text
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/478989.pdfIn PDF document text
    • https://tedofejufada.weebly.com/uploads/1/3/0/7/130775935/savulutubimuxufisil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482629/normal_5ff16d5408d90.pdfIn PDF document text
    • https://cdn.sqhk.co/jabupexipa/ijhj4ih/40197250078.pdfIn PDF document text
    • https://zodemabu.weebly.com/uploads/1/3/4/8/134896511/4987882.pdfIn PDF document text
    • http://tricitysikhs.com/99941736691p9c73.pdfIn PDF document text
    • http://stixlife.info/nabefimotedegepizalazurzabwt.pdfIn PDF document text
    • http://hookup154.online/93362174528upe72.pdfIn PDF document text
    • https://kaguleturega.weebly.com/uploads/1/3/4/9/134904612/1529047.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EF 4908 bytes
SHA-256: b3bedbf51a457046f174d9c81601c6871e9ab2d64ad4e947ab8e045fa102d038
font_01_sfnt_off0000e7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C5 10976 bytes
SHA-256: 5d96ef3ace84887faadc5930b859178a9025e1ff23f95eb86297d016bfdb8599
font_02_sfnt_off00010d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D56 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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